Select the ordered pair from the choices below that is a solution to the following system of equations:
5y=x-7
4x-y=-10

A. (-8,3)
B. (1/5,8)
C. (-3,-2)
D. (-1,-1)

Question

Select the ordered pair from the choices below that is a solution to the following system of equations:
5y=x-7
4x-y=-10

A. (-8,3)
B. (1/5,8)
C. (-3,-2)
D. (-1,-1)

anonymous · Answer

C is the answer...

anonymous · Answer

First get variables on same side. 5y - x = -7 and 4x-y = -10 then multiply top equation by 4 so x's will cancel in nxt step. Now you have
 20y -4x = -28 
+(4x - y) = -10 
so 19y = -38 
y = -2
 now sub -2 back into equation to get 
5(-2) = x-7
x = -3 
So yes C is the answer, but in case you wanted to know how to solve the problem yourself next time I gave you the steps to do so if you need further explanation let me know.